Expansion of vomeronasal receptor genes (OlfC) in the evolution of fright reaction in Ostariophysan fishes.

ABSTRACT: Ostariophysans are the most diverse group of freshwater fishes and feature a pheromone-elicited fright reaction. However, the genetic basis of fright reaction is unclear. Here, we compared vomeronasal type 2 receptor-like (OlfC) genes from fishes having and lacking fright reaction, to provide insight into evolution of pheromonal olfaction in fishes. We found OlfC genes expanded remarkably in ostariophysans having fright reaction compared with fishes lacking fright reaction. Phylogenetic analysis indicates OlfC subfamily 9 expanded specifically in ostariophysans having fright reaction. Principle component and phylogenetic logistic regression analysis partitioned fishes by ecotype (having or lacking fright reaction) and identified OlfC subfamily 9 as being an impo

SUBMITTER: Yang L 

PROVIDER: S-EPMC6588630 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature